CNRFC - Hydrology - Observed River/Reservoir Conditions

RUSSIAN RIVER - HOPLAND (HOPC1)

Latitude: 39.03º N	Longitude: 123.13º W	Elevation: 498 Feet
Location: Mendocino County in California		River Group: Russian Napa

Monitor Stage: N/A

Flood Stage: 15.0 Feet

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2021*	948	4.36	Feb 2, 2021
2020*	2,740	8.20	Jan 16, 2020
2019*	22,200	22.95	Feb 27, 2019
2018*	9,160	16.26	Apr 6, 2018
2017*	16,600	22.25	Jan 11, 2017
Historical High Stage/Flow Events (Period of Record - Oct 1939 to Present) - Ranked by Flow
1956	45,000	27.00	Dec 22, 1955
1965*	41,500	26.01	Dec 22, 1964
1974*	39,700	25.50	Jan 16, 1974
2006*	35,600	26.81	Dec 31, 2005
1986*	32,900	22.96	Feb 17, 1986
* Discharge affected by regulation or diversion

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ113)

Tonight: Mostly clear. Patchy valley fog overnight. Lows 52 to 62.

Sunday: Sunny. Patchy valley fog in the morning. Highs 73 to 88.

Sunday Night: Mostly clear. Lows 51 to 61.

Monday: Sunny. Highs 75 to 90.

Monday Night: Partly cloudy. Lows 52 to 62.

Tuesday: Sunny. Highs 76 to 91.

Tuesday Night and Wednesday: Mostly clear. Lows 53 to 63. Highs 79 to 94.

Wednesday Night and Thursday: Partly cloudy. Lows 55 to 65. Highs 79 to 94.

Thursday Night: Mostly clear. Lows 55 to 65.

Friday: Sunny. Highs 80 to 94.

Friday Night and Saturday: Mostly clear. Lows 55 to 65. Highs 79 to 94.

Impacts - E19 Information
15.0 Feet	Flooding of Highway 175 is expected at the approaches to the Russian River bridge. Expect minor flooding of crop land on the right bank of the river.
17.0 Feet	Significant flooding of Highway 175 at the approaches to the Russian River bridge. Minor flooding of Highway 222 near Ukiah, and in crop land along the left and right banks of the Russian River near Hopland.
18.0 Feet	Flooding of Highway 222 near Ukiah. Secondary roads in low-lying areas will be flooded in the Hopland, Ukiah, and Talmage areas.
20.0 Feet	Flooding of low-lying structures east of the railroad tracks near Hopland.
21.0 Feet	Flooding of low-lying structures just west of the railroad tracks near Hopland.
23.0 Feet	Flooding of farm land, buildings and low-lying homes in the Hopland area. Flooding will begin in the Ukiah and Talmage areas.
24.0 Feet	Flooding of low-lying structures and farm land in the Hopland, Ukiah, and Talmage areas. Many secondary roads may also be flooded. Severe bank erosion is possible.
25.0 Feet	Severe bank erosion is likely with widespread flooding of farm land, buildings and low-lying homes in the Hopland, Ukiah, and Talmage areas. Many secondary roads will be flooded. This level of flooding caused 6100 acres to flood in February 1940.
26.0 Feet	Widespread major flooding will occur. Primary roads and some bridges will flood.
27.0 Feet	Widespread major flooding. At the forecast level, over 500 homes and farm buildings were damaged on December 22,1955. 6300 acres of land were inundated by flood waters. All persons in the area are urged to move to high ground and take appropriate action to protect life and property.
28.0 Feet	Disastrous flooding will occur. Many homes and businesses could be damaged. Many primary and secondary roads and some bridges could be washed out.
30.0 Feet	Disastrous flooding. Many homes and businesses damaged. Numerous primary and secondary roads and some bridges could be washed out. This is equal to the highest known stage, which occurred in December 1937. 6500 acres were inundated by flood waters.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Eureka Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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